Gas-engine.



. J. T1( COWIB.

-GAS ENGINE. l APPLIQATION PILEDIMAR.25,190Q.

987,860,v Patented Mar.28,19'11.

' A Arm/Wely ulcrum 23 and does not come upon the eccentricrod. Q

The advantages of an eccentric operated piston valve over the usual camoperated', vpuppet valve with its springs are both in simplicity ofconstruction and of operation self evident, and the only knownobjections to their use are eectually overcome in the mechanism justdescribed. Having now particularly described my invention and the mannerof its operation I hereby declare that what I claim` as new and desireto be protected in by Letters Patent is;

l. In. a gas engine, a piston valve, a cylindrical valve chamber forsaid valve, one end of said valve chamber having port connec tions withthe explosionfend of the engine cylinder and the other end of said valvechamber'having port connections with a gas passage, means for impartingendwise movement to said valve, saidvalve moving means vcomprising aneccentric, a rotatable shaft on which' said eccentric is mounted, a rodconnected to said eccentric, a fulcrumed lever connected to said rod, arod connecting said fulcrumed lever to lthe respective valve, all beingarranged that when the valve is at the limit of its movement toward theexplos'ion end of the cylinder, the connection between the valve lrodand the lever will be approximately over the fulcrum, substantially asshown and for the purposes described.

2. Ina gas engine, a piston valve, and an eccentric, a ulcrumedlevel-,rod connections between said eccentric and said ulcrumed lever, avalve rod connection between said fulcrumed lever and the respectivevalve, said rod and said i'ulcrumed lever being so relatively' connectedand tulcrumed that the eccentric rod pin vibrates equally on each sideof, the fulcrum Aof the lever= while the valve-od 'pin vibrat-esentirely between the ber at the thirdA or apex corner, all beingarranged that when said eccentric rod is at the limit of its movement inone direction, said pivot between said eccentric rod and said triangularmember will lie a given distance beneath the pivot of said triangularmember, and the pivotal connection between y said piston rod and saidtriangular member will liel in horizontal -alinementvvwith the pivot ofsaid triangular member, and when said eccentric rod is at the otherlimit of its movement, the pivot between said eccentric rod and saidtriangular member will lie la distance above the pivot of saidtriangular member equal to said given distance and the pivot betweensaidpiston'rod and said triangular member will lie still farther above said'pivot of said triangular member.

1. In a valve gear for explosive engines and the like, the combinationwith the re ciprocating valve and the eccentric, Vot a triangular memberpivoted at one corner, a valve rod connecting said valve and pivot to'another corner of said triangular member directly opposite said pivotthereof, an

`eccentric rod 'pivoted to said ltriangular member at another' corner,ali being arranged .that when said eccentric is at the limit of itsmovement in one direction the pivotal connection between said eccentricrod and said triangular membenwill lie a given distance to onefside ofsaid triangular member pivot andwhen said eccentric rod is f inthe-limit of its movement in an opposite direction, said pivotalconnection between saidrod and said triangular member will lie adistance to the other side of said triangular member pivot equal to saidgiven distance, and said triangular pivotal connection between saidpiston rod and sr d triangular member will always lie to one side ofsaid'pivot of said triangular member.

5. In a gas engine, the combination with a piston valve and aneccentric, of transmission mechanism' between said eccentric and saidvalve, saidtransmission mechanism comprisingl a triangular memberpivoted at one corner, a piston rod pivoted to said tri angular memberat the cornerdirectly opposite to said first mentioned pivot., an eccentric rod pivoted to said triangular member at the third or apex corner,said eccentric I rection said pivot between said eccentric rod andsaidtriangular member will lie a gi L)in distance beneath the pivot ofsaid triangulaimember, and the pivoted connection between said pistonrod and said-triangular member will lie inhorzontal alinenent with thepivot of said triangular membei and when said eccentric rod 'is at theother limit of its movement the pivot between saideccentric rod and saidtriangularvmember will'le a distance above the pivot of said triangularmember equal to said given distance and the pivotbetween said .pistonrod and said triangular member will lie still farther above said pivotof said triangular member, substantially as shown and for the purposes.de-

scribed.

In testimony whereof I havesigned my name to this specification-in thepresence of twosubscribing witnesses.

' JOHN T. COWIE. Witnesses:

' ROWLANQ Balmain,

